Fermenting Lids for Wide Mouth Mason Jars. Fermentation Kit for Sauerkraut, Pickles, Kimchi, and other Fermented Foods. Waterless Airlocks: No Pumps or Crock Pots Needed. Made in USA-8 Pack. Pickle and Ferment Your Favorite Vegetables, Fruits, & More! Our compact, waterless airlocks make fermenting as set-it and forget-it as you can get. Pack your veg & fruits into your crock, pour your brine in, put the seal on, place your cap on, ferment, and move right in to the fridge. Our airlocks will keep your food fresh while in the fridge, no need to replace the cap! The FermentEm(TM) Kit Turns Any Wide Mouth Mason Jar (jar not included) into a Fermenting Crock Includes: 8 Wide Mouth Plastic Cap Fermentation Jar Lids w/ Pre-Installed Rubber Grommets, 8 Mason Jar Seals (Made in the USA from FDA-Approved Silicone), & 8 Waterless Airlocks. Everything we use is made/sourced in the USA to ensure only the best in quality Every Component is BPA-Free, Food-Safe, & Washable BONUS! Dishwasher-Safe (Top Shelf Only) Storage Container Helps Keep The Fermenter Organized